Krokovny, P;
Abe, K;
Abe, K;
Abe, T;
Adachi, I;
Ahn, BS;
Aihara, H;
... Belle Collaboration, .; + view all
(2002)
Observation of Ds+K- and evidence for D-s(+)pi(-) final states in neutral B decays.
PHYS REV LETT
, 89
(23)
, Article 231804. 10.1103/PhysRevLett.89.231804.
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Abstract
We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel (B) over bar (0)-->Ds+K- is found in a sample of 85x10(6) B (B) over bar events, collected with the Belle detector at KEKB, with a branching fraction B((B) over bar (0)-->Ds+K-)=(4.6(-1.1)(+1.2)+/-1.3)x10(-5). We also obtain evidence for the B-0-->D(s)(+)pi(-) decay with branching fraction B(B-0-->D(s)(+)pi(-))=(2.4(-0.8)(+1.0)+/-0.7)x10(-5). This value may be used to extract a model-dependent value of \V-ub\.
| Type: | Article |
|---|---|
| Title: | Observation of Ds+K- and evidence for D-s(+)pi(-) final states in neutral B decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.89.231804 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.89.231804 |
| Language: | English |
| Keywords: | ANNIHILATION |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1308391 |
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